JP2001348067A - Cushioning filer for packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning filler for packaging having both of elasticity and hardness in spite of an air bag system and excellent in durability and use frequency by employing a check valve having a high performance and a simple structure. SOLUTION: In the cushioning filler for packaging wherein a plurality of air chambers filled with air to be expanded are arranged side by side, large air chambers and small air chambers, which have width sufficiently narrower than that of the large air chambers and of which the side walls are common to those of the large air chambers, are alternately arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock-absorbing packing material used for transporting articles.

[0002]

2. Description of the Related Art Conventionally, foamed polystyrene has been mainly used as a buffer filler for filling a dead space at the time of packing. Styrofoam can be formed into any shape, is lightweight, has an appropriate initial hardness, and has been used quite generally. As a usage form, a shape which was previously formed into a shape conforming to the space shape between the article to be packed and a packing container such as a box, or a so-called bead or beans shape was used.

However, in disposal after use,
The use of harmful substances during incineration, the scattering of beads and the like due to their light weight, and the fact that they are not decomposed have been restricted internationally.

Therefore, air-bag-like materials, foam materials using biodegradable materials, and the like have come to be used as buffer filling materials in place of conventional polystyrene foam. The air bag is provided with a check valve as disclosed in, for example, JP-A-8-34478, Japanese Utility Model Laid-Open No. 4-132607, and Japanese Utility Model Application Laid-Open No. 1-161475. However, there are problems with the production cost and the performance of the check valve, and it has not yet been widely used.

[0005] There have been various types of check valves, which have been a problem of the conventional air bag type packing and filling materials, such as those in which resin sheets are overlapped, so-called insect rubber type used for automobile tires and the like.

[0006]

However, the conventional air bag type cushioning filler has a problem in shock absorption when a material sheet having low elasticity is used. If used, it is rich in elasticity and flexibility, but when the weight is too heavy due to insufficient hardness, the amount of movement of the object to be packed is large, and it is used for those where movement in the packaging container becomes a problem. I couldn't do that.

Although the check valve used is advantageously a resin sheet type in terms of cost, since the function as the valve is not perfect, the internal air gradually leaks when overloaded. As a result, there is a problem in that it may not function as a packing filler. That is, there was a problem in the reliability of the check valve.

[0008] For example, JP-A-2-57560 and JP-A-9-207946 disclose a sheet type check valve. However, since each of them has a planar configuration, the degree of adhesion between two sheets can be reduced. Various measures have been taken to increase the air passage, such as complicating the air passage. However, it is fatal to have a planar configuration in the first place, and sufficient performance cannot be obtained unless an additional member such as a spring is used.

Therefore, the cushioning filler for packing according to the present invention solves the above-mentioned conventional problems and employs a check valve having a high performance and a simple structure while having both elasticity and hardness while being an air bag type. An object of the present invention is to provide a durable and highly reusable packing cushioning filler.

[0010]

That is, the packing cushioning filler of the present invention has the following features. (1) In a cushioning filler for packing comprising a plurality of air chambers which are filled with air and expanded, a large air chamber and a side wall having a width sufficiently smaller than the width of the large air chamber and the large air chamber. And small air chambers that share
All air chambers must be in communication. (2) In a cushioning filler material for packing comprising a plurality of air chambers which are filled with air and expanded, two or more air chambers are provided in parallel and closely adjacent to each other with a desired interval sufficiently smaller than the width thereof. The partition is formed by two partition walls, and a space sandwiched between the two partition walls communicates with an adjacent air chamber through a vent provided in the partition wall. (3) An air bag having a mat-like outer shape formed by laminating two flexible sheets into a cylindrical shape or by welding an opening end of a flexible sheet previously formed into a cylindrical shape. In, while having two partitions so as to connect the opposing wide surfaces of the air bag at a desired interval, the two partitions partition the air bag and the width of the divided air chamber between the partitions A sufficiently narrow air chamber, and the divided air chamber and the narrow air chamber communicate with each other through a vent provided in a partition wall. (4) In a cushioning filling material in which a plurality of air bags to be filled with air and inflated are arranged in parallel, each adjacent air chamber is provided at a desired interval and has an air hole for communicating the air chamber. When the air chamber is filled with air, the partition walls are pulled by the inflating force in the thickness direction of the buffer filler, so that the partition part is in the buffer filler. Be a highly rigid part. (5) In the cushioning filling material in which a plurality of air chambers for filling and expanding air are arranged in parallel, each air chamber is connected via a member having a higher spring constant than the spring constant of the air chamber as an air spring. Being juxtaposed. (6) The air bag structure is a so-called gusset bag structure. (7) The air chamber has a filling port for air, and the filling port has a check valve. (8) In the check valve, a passage formed by stacking two sheets is in close contact with a spherical surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cushioning filler for packing according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view of a cushioning filler for packing (hereinafter referred to as a filler) 1 of the present invention. The filler 1 has a slightly elongated rectangular shape as a whole, is provided with a check valve 2 above in the figure, and has a longitudinal welding line 3 at a position that divides the entire circumference and the width direction into approximately three equal parts.

FIGS. 2A and 2B show cross sections taken along lines AA and BB, respectively. The whole filler 1 is formed in a so-called gusset bag shape, and the cross section at the center AA is substantially circular, but the cross section at the BB near the end in the longitudinal direction is slightly rectangular.

As shown in FIG. 2A, the large air chambers 4a, 4b, 4c arranged side by side are separated by two partition walls 5, 5 '. The two partitions 5, 5 'are separated by a desired distance (C), and a narrow air chamber 6 is provided between the partitions. The large air chamber 4 and the narrow air chamber 6 sandwiched between the two large air chambers communicate with each other through a vent 8 provided in the partition 5. In the figure, reference numeral 7 denotes a welded piece on the outer periphery.

In FIG. 2B, the broken line is the cross-sectional shape of the center, and the arrow (D) shown in the middle is the allowable deformation range of the center of the large air chamber 4. As will be described later, it is in this range that the large air chambers 4 individually function as air springs, and in a case where deformation by external pressure is forced to be lower than the height (H) of the narrow air chamber. The entire filler 1 works as one air chamber. When deformed within this range, the air at that portion is pushed out to the next room through the vent 8. Thus, the extruded air is filled 1
Since it is dispersed throughout, the adjacent portion is not deformed (swelled) due to an increase in internal pressure due to partial deformation, and the degree of deformation with respect to external pressure is small as a whole, and the shape stability is high.

FIG. 3 is an explanatory view of the formation of the filler of the present invention.

A tubular flexible sheet (hereinafter referred to as a main body sheet) 9 formed in advance is prepared so that two sheets are stacked. At this time, in order to form a gusset bag, both ends 10 are folded inward by a predetermined size, and the bent portions 11 at the left and right ends are welded.

The main body sheet is made of polyethylene,
A resin sheet such as polypropylene, polyester, or polycarbonate is suitable, but any material that is flexible and can be fixed, such as welding or bonding, such as a single material, a composite material such as a laminate, or a composite sheet with a metal. If available.

The separately prepared tubular sheet 10 is provided with a vent 8 at a portion near one of the ends. The width (E) of the tubular sheet 10 is a dimension obtained by adding a welding width F to a dimension G (within a dashed circle) in which the bent portion of the main body sheet 9 is extended. That is, this dimension is the thickness width of the filler 1. The tubular sheet 10 is disposed between the main body sheets 9 with the vent 8 facing in the left-right direction, at a position where the left and right widths are equally divided (in the figure, divided into three equal parts). Weld with. At this time, the cylindrical sheet 10
Is a composite sheet of nylon (NY) and polyethylene (PE), the non-welded nylon side is the inside. When the main body sheet 9 is formed of the same material as the tubular sheet 10, the inside is made of polyethylene. When using a sheet of another material, if the material is easily welded, it is necessary to take care that the inner surfaces of the tubular sheet 10 do not weld together.

The check valve 2 is sandwiched between any open ends (upper end in the figure) 12 of the main body sheet 9 and the upper and lower open ends 12 are welded. FIG. 4 is a completed plan view in which all welding is completed.

When the inside is filled with air from the check valve 2, the large air chamber 4 expands as shown in FIG. FIG. 5 is a top view as viewed from the check valve side. The vertical and horizontal dimensions of the large air chamber 4 are preferably approximately H: W = 1: 2.

FIG. 6 illustrates an example in which the main body sheet 9 is formed of a sheet which has been previously formed into a cylindrical shape.

The sheet 9 is pulled in the lateral direction, and the left and right ends 10 are folded inward at the center to form a W-shape. At this time, the bent portions 11 at the left and right ends are desirably welded as shown on the left side of (c), but need not be welded as shown on the right side.

The filler 1 formed as described above functions as shown in FIG.

First, as shown in (a), when air is filled from the check valve 2 and the internal pressure increases, the large air chamber 4 expands to have a circular cross section. Then, the partition 5 is pulled by the expansion of the large air chamber 4 and is pulled in the vertical direction in the figure. At this time, since all the air chambers 4 and 5 communicate with each other through the ventilation holes 8 provided in the partition walls 5, the internal pressure is constant in all the air chambers. There is no close contact due to the expansion of the chambers (eg, 4b and 4c).

As shown in (b), for example, when a part of the large air chamber 4c is deformed inward by external pressure,
The air in that part passes through the ventilation port 8 of the partition 5 and the other air chamber 4
Since it flows to a and 4b and is dispersed throughout the filler 1, the internal pressure is partially increased, the expansion is increased only in that part, and the whole is not distorted, and the shape of the entire filler 1 is maintained. When the large air chamber 4 undergoes compressive deformation due to external pressure, the internal pressure of the other deformed portions increases uniformly, and each large air chamber 4 tends to expand further.
At the same time, the tension of the partition 5 increases.

From the above, the filler 1 of the present invention is:
Since the large air chamber 4 receives an external pressure in the thickness direction of the sheet, it can be relatively easily deformed as an elastic body (air spring), but the air chamber 6 sandwiched by the partition walls 5 has a large internal pressure. While being the same as the chamber 4, it is subjected to an external pressure in the tension direction, and the tension is applied in advance,
Since deformation (buckling) due to external pressure does not occur until the tension becomes zero, it is difficult to deform as if a member such as hard urethane is inserted. It is more difficult to deform as the large air chamber 4 undergoes compression deformation due to external pressure.

Therefore, the filler 1 according to the present invention is shown in FIG.
As shown in (1), while the large air chamber 4 is in a certain external pressure range until it is compressed and deformed to the height of the partition wall 5, the air spring can be appropriately deformed as an air spring (a). (B) When a greater external pressure is applied and the tension of the partition 5 is reduced to zero and then the external pressure is further applied, the partition 5 buckles, and the entire filler 1 becomes one large air chamber. Yes (c).

FIG. 9 shows an example of using the filler 1 of the present invention. (A) is a transparent front view in a state where the contents are stored in a box, and (B) is a transparent plan view.

The outer box is made larger by the thickness of the filler 1 (approximately G in FIG. 3) than the contents to be stored therein.
A filler 1 filled with air is spread on the bottom of the outer box in advance, and the contents are placed thereon. Then, the filler 1 is pushed into the space on the side face and inserted, and finally, the filler 1 is placed on the upper part of the contents and the lid of the bottom box may be closed. In the figure, filler 1 on the side
Are connected diagonally as shown in FIG. 10C.

FIG. 10 shows another example of the structure of the filler 1 of the present invention. (A) shows the case where the number of the air chambers 6 of the partition wall 5 is one, and (B) shows the case where the number of the air chambers is three. That is, the number of air chambers 6 in the partition wall 5 may be appropriately increased or decreased according to the overall dimensions of the filler 1 and the like. (C) is one in which two fillers 1 are vertically connected for convenience to hit the corner of the stored item as described above.

FIG. 11 is a plan view showing a check valve 2 used for the filler 1 of the present invention.

As shown in the figure, almost half or more of the check valve 2 at the tip (lower end in the figure) is curved into a spherical shape like a spoon. FIGS. 12A and 12B are a perspective view, a front view and a side view of the check valve 2, respectively.

As shown in FIG. 13, the check valve 2 is formed by laminating two sheets 13 and 13 '(a), welding both ends of the side faces (b), and pressing the spherical surface. (C). In the figure, reference numeral 14 denotes a knob for opening the opening end face 15. The material sheet is preferably a resin sheet of polyethylene, polypropylene, polyester, polycarbonate, or the like, or a composite sheet thereof, similarly to the main body sheet 9 described above. Also, two sheets 1 to be superimposed
3, 13 'may be of the same thickness, but one (especially the curved inner sheet) may be made thicker and function as a moderate elastic body. That is, the inner sheet is a spherical spring, and the thin sheet is adhered to the back surface with a shear force. By doing so, the degree of adhesion increases, and the non-leakage performance of the valve is higher.

As for the use of the check valve 2 configured as described above, as shown in FIG. 14, first, a knob provided inside one of the seats (this is formed by extending one of the seats constituting the valve). The end 14 of the valve is opened by pulling the valve 14 in a direction to release the close contact of the opening end 15, and a rod 16 such as a straw is inserted there (a, b). When the sheet is further pushed in, the close contact of the sheet with the spoon-shaped portion 17 is gradually released to form a passage (c). Conversely, when the rod-shaped body 16 is pulled out, the spoon-shaped portion 17 comes into close contact again and closes the valve. Further, the higher the internal pressure, the higher the adhesion of the sheet.

FIGS. 15 to 19 show another check valve 2 'usable in the present invention.

The check valve 2 ′ is formed by an openable / closable passage body 101 made of a soft sheet and an elastic plate 106. The passage body 101 can be formed by laminating two soft sheets, and the passage portion 102 can be opened in a cylindrical shape. Also, on both sides of the passage portion 102,
A slip stopper 103 that is sandwiched between the elastic plates 106 and holds the passage body is formed.

As the passage body 101, a soft sheet to be used may be a rubber sheet, a plastic sheet, waterproof paper,
It is desirable to choose from a waterproof cloth, an aluminum box or a composite sheet of these.

The width of the passage portion 102 of the passage body 101 is desirably a size such that insertion can be performed without difficulty according to the diameter of the rod to be inserted, and that there is a margin for ventilation around the inserted rod. In this way, when filling the container with the contents, the contents can be filled from the rod-shaped portion, and the air in the container can be released from the surroundings so that the filling operation can be performed without difficulty.

As means for forming the passage portion 102 in the passage body 101, means for bonding two soft sheets and heat-welding at the slip preventing piece portion is desirable, but it is needless to say that other forming means may be used. is there. Slip stopper 10
In welding 3, it is sufficient to weld only the boundary with the passage portion 102.

A pair of elastic plates 106 shown in FIG. 13 are for opening / closing the passage body 101, particularly for automatically closing the passage body 101. The support 105 is an elastic plate 106
And are formed separately.

The material of the passage body 101 and the elastic plate 106 can be selected from a plastic sheet, a metal sheet, or a composite sheet using these as a constituent material. Examples of the plastic sheet include polyethylene, polypropylene, polyester, polycarbonate and the like. In this case, it is desirable that the passage body 101 be made of the same material.

As materials, the passage body 101 and the elastic plate 10
It is desirable to use a single material for any of the plastic materials and sheets constituting 6. For example, a material similar to a plastic-based bag or a bag made of a composite sheet of these and aluminum foil, etc., used in everyday homes, etc., is versatile as a material, workability, processability after garbage, etc. It has been confirmed that the present invention is extremely suitable for solving the above problems.

The check valve 2 'assembled as described above is held in an arc shape with the passage body 101 being bent along with the bending of the elastic plate 106 as shown in FIG. . By doing so, it is possible to hold the elastic body 106 along the shape thereof, and to surely maintain the curvature thereof, so that the passage body 101 can be firmly pressed.

The operation of the check valve 2 'constructed as described above will be described.

This check valve is connected to the passage portion 1 of the passage body 101.
By inserting the rod-shaped body 131 into the inside of the valve body 02, the close contact of the passage portion 102, which has been tightly adhered by the elastic plate 106, is released to secure a passage. The reason for using a straw as the rod 131 is to secure a more reliable passage.

For use, a rod-like body 1 such as a straw
31 is inserted from the upper end of the passage body 101. Actually, by attaching a cap or an attachment port to this portion, the rod 131 is formed in a shape that allows easy insertion. Then, when the rod 131 is gradually pushed down, the passage 1
The passage portion 102 of 01 is pushed out against the elastic plate 106.

When the rod 131 is further depressed, the rod 131 is pushed along the entire length of the rod 131 to form a passage.

Conversely, when trying to close the passage, the rod 131 may be simply pulled out. That is, the elastic plate 10
6 gradually returns to the original position, and the full length automatically comes into close contact again. At this time, when the pressure in the container is applied to the check valve, the pressure is transmitted to the passage body 101 via the elastic plate 106, and the passage portion 102 of the passage body 101 is further hermetically sealed.

FIG. 16 is a further simplified version of FIG. In this configuration example, the elastic body 106 is formed of one sheet, the passage body 101 is overlapped along the back surface of the elastic body 106, and both ends are fixed by folding back both ends of the elastic body 106.

FIG. 17 shows still another configuration example in which the performance as a check valve is enhanced. The check valve 2 ″ is provided with an openable / closable passage body 1 made of a soft sheet.
01, a support 105 and an elastic plate 106. The passage body 101 can be formed by laminating two soft sheets, and the passage portion 102 can be opened in a cylindrical shape. Also, on both sides of the passage portion 102,
A slip stopper 103 is formed between the support 105 and the elastic plate 106 to hold the passage body.

As the passage body 101, a soft sheet to be used may be a rubber sheet, a plastic sheet, waterproof paper,
It is desirable to choose from a waterproof cloth, an aluminum box or a composite sheet of these.

It is desirable that the width of the passage portion 102 of the passage body 101 is such that it can be inserted without difficulty according to the diameter of the rod to be inserted, and that there is a margin for ventilation around the inserted rod. In this way, when filling the container with the contents, the contents can be filled from the rod-shaped portion, and the air in the container can be released from the surroundings so that the filling operation can be performed without difficulty.

As a means for forming the passage portion 102 in the passage body 101, means for bonding two soft sheets and heat-welding at the slip preventing piece portion is desirable, but it is needless to say that other forming means may be used. is there. Slip stopper 10
In welding 3, it is sufficient to weld only the boundary with the passage portion 102.

The pair of support members 105 and the elastic plate 106 shown in FIG. 17 are for opening / closing the passage body 101, particularly for automatically closing the passage body 101. The support 105 is formed separately from the elastic plate 106. A lid 108 is formed at the end of the support 105 via a plastic hinge so as to extend in the left and right directions. It is desirable that the support 105, the plastic hinge and the lid 108 are formed by injection molding a plastic material made of polyethylene, polypropylene, polyester, polycarbonate or the like into a predetermined shape. Of course, the molding method is not limited to this injection molding.

In FIG. 17, holding guides are protrudingly provided on both upper and lower sides of the support 105, respectively. At the center of the upper end of the support 105, an insertion guide is provided at a position where the rod is inserted.

The lid 108 has a guide groove having an arc-shaped cross section for accommodating the passage body 101 passing through the rod-like body at substantially the center of the flat plate, and ribs for pressing the elastic plate 106 are formed on both sides thereof. A pair is formed along the length direction of the passage body 101. The length, shape, position, and number of the ribs can be appropriately determined according to the thickness, size, and the like of the elastic plate 106. However, it is desirable that the elastic plate 106 has a sufficient length, shape, position and number so as not to impair the opening / closing reaction.

Reference numeral 114 denotes a hook for connecting to the support 105 provided at the end of the lid 108. The hook 114 is fitted into a receptacle 115 provided at the end of the support 105 so as to penetrate in the thickness direction, and is prevented from falling off. In this way, by fixing the support 105 and the elastic plate 106 together with the lid 108 in a state of being bent at a predetermined curvature, a check valve with extremely excellent durability can be obtained.

The material of the passage body 101 and the elastic plate 106 can be selected from a plastic sheet, a metal sheet, or a composite sheet using these as a constituent material. Examples of the plastic sheet include polyethylene, polypropylene, polyester, polycarbonate and the like. In this case, it is desirable that the passage body 101 be made of the same material.

As for the material, the passage body 101 and the support body 10
It is preferable to use a single material for each of the plastic material and sheets constituting the elastic plate 106, the elastic plate 106, and the lid 108. For example, a material similar to a plastic-based bag or a bag made of a composite sheet of these and aluminum foil or the like, which is used in everyday households, is versatile as a material, workability,
It has been confirmed that the present invention is extremely suitable for solving the above-mentioned problems in terms of the processability after dusting and the like.

The check valve assembled as described above holds the passage body 101 in an arc shape with the passage body 101 curved along with the curvature of the support 105 and the elastic plate 106 as shown in FIGS. And the lid 108 is at the position of the string. By doing so, the shape of the elastic plate 106 can be held along the support 105 by the lid 108, and the curvature can be surely maintained by the rib 113, and the passage body 101 is firmly pressed. be able to.

The operation of the check valve 2 'constructed as described above will be described.

This check valve is connected to the passage portion 1 of the passage body 101.
By inserting the rod-shaped body 131 into the inside of the support member 02, the close contact of the passage portion 102, which has been in close contact with the support body 105 and the elastic plate 106, is released to secure a passage. The reason for using a straw as the rod 131 is to secure a more reliable passage.

In FIG. 20, which explains the above operation in more detail, the tip of a rod 131 made of a straw is
01 from the upper end of the guide portion 104. actually,
By attaching a cap or mounting opening to this part,
The rod-like body 131 has a shape that allows easy insertion. And
When the rod 131 is gradually pushed down as shown in FIGS. 7A to 7C, the passage portion 102 of the passage body 101 is pushed out together with the elastic plate 106.

When the rod 131 is further pushed down, the elastic plate 106 pressed against the support 105 by the lid 108 is spread over the entire length along the rod 131, and as shown in FIG. The contents can be freely distributed.

Conversely, when trying to close the passage, the rod 131 may simply be pulled out. That is, the elastic plate 10
6 gradually returns to the original position and closely adheres to the support 105,
The path portion 102 of the path body 101 follows the reverse of FIGS. (D) to (a), and the entire length automatically comes into close contact again. At this time, when the pressure in the container is applied to the check valve, the pressure is transmitted to the passage body 101 via the support body 105 and the elastic plate 106, and the passage portion 102 of the passage body 101 is further hermetically sealed.

[0067]

The cushioning filler for packing formed as described above has both a high flexibility portion and a low flexibility portion, that is, a portion having a low spring constant and a high spring constant. It functions as a cushioning filler material.

Therefore, it can be used very effectively as a buffer filler in place of the conventional polystyrene foam.

Further, since the filled air is not leaked by using a simple and high-performance check valve, the performance can be maintained as a filler and the reuse can be easily performed.

Further, since the manufacturing cost does not increase, the system is widely used.

[Brief description of the drawings]

FIG. 1 is a plan view showing a cushioning filler for packing according to the present invention.

FIGS. 2A and 2B are cross-sectional views of main parts thereof.

FIG. 3 is a conceptual diagram showing the manufacturing process.

FIG. 4 is a completed plan view.

FIG. 5 is a top view in a state where air is filled.

FIGS. 6A, 6B, and 6C are schematic diagrams showing other configuration examples.

7 (a), (b) and (c) are schematic views showing the operation.

8 (a), (b) and (c) are schematic views showing the operation.

FIGS. 9 (a) and 9 (b) are explanatory views showing the use state of the filler of the present invention.

FIGS. 10A to 10C are front views showing other examples of the configuration of the filler according to the present invention.

FIG. 11 is a plan view showing a check valve.

FIG. 12 is (a) a perspective view, (b) a front view, and (c).
It is a side view.

FIGS. 13A to 13C are schematic diagrams showing the manufacturing process.

FIGS. 14A to 14C are schematic diagrams showing a use state.

FIGS. 15A to 15C are exploded views showing other check valves.

FIGS. 16A and 16B are exploded views showing another check valve.

FIG. 17 is an exploded view showing still another check valve.

FIG. 18 is a perspective view thereof.

FIG. 19 is a sectional view of a main part thereof.

FIGS. 20A to 20D are cross-sectional views showing the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packing buffer filling material 2, 2 'Check valve 3 Welding wire 4 Large air chamber 5 Partition wall 6 Narrow air chamber 7 Welding piece 8 Vent 9 Open end 10 Left and right end 11 Bent part 12 Opening 13 Material sheet 14 Knob 15 Opening 16 Bar-shaped body 17 Spherical portion 101 Passage body 102 Passage portion 103 Detent member 105 Support body 106 Elastic plate 108 Lid 113 Rib 114 Hook 115 Receptacle 131 Rod-shaped body

Claims (8)

[Claims] 1. A cushioning filler material for packing comprising a plurality of air chambers arranged to be filled with air and expanded, the large air chamber having a width sufficiently smaller than the width of the large air chamber and the large air chamber. And a small air chamber sharing a side wall are alternately arranged, and all the air chambers communicate with each other. 2. A packing cushioning material comprising a plurality of air chambers which are filled with air and are expanded in parallel, wherein the air chambers are provided close to and parallel to each other with a desired interval sufficiently smaller than the width thereof. A cushioning filler for packing characterized by being juxtaposed by two partition walls, and wherein a space sandwiched between the two partition walls is communicated with an adjacent air chamber by a vent provided in the partition walls. 3. A mat-like outer shape formed by superposing two flexible sheets on each other to form a cylindrical shape, or by welding an open end portion of a flexible sheet previously formed into a cylindrical shape. In the air bag, the air bag is provided with two partitions so as to connect the opposed wide surfaces of the air bag at a desired interval, and the two partitions partition the air bag and define the divided air chamber between the partitions. A cushioning filling material for packing, wherein an air chamber sufficiently narrower than a width is formed, and the divided air chamber and the narrow air chamber communicate with each other through a vent provided in a partition wall. 4. A cushioning filler comprising a plurality of air bladders which are filled with air to be inflated and inflated, wherein adjacent air chambers are provided at desired intervals and have air holes for communicating the air chambers. When the air chamber is filled with air, the partition wall portion is pulled by the inflating force in the thickness direction of the buffer filler, so that the partition portion is filled with the buffer. A cushioning filler for packing, which is a high-rigidity part of the material. 5. A cushioning filler comprising a plurality of air chambers arranged to be filled with air and expanded, wherein each air chamber is formed of a member having a higher spring constant than the air chamber has as a spring constant. A cushioning filler material for packing, which is arranged side by side through a hole. 6. The packing material according to claim 1, wherein the air bag structure is a so-called gusset bag structure. 7. The air chamber has an air filling port,
The cushioning filler for packing according to any one of claims 1 to 6, wherein the filling port is provided with a check valve. 8. The cushioning filler according to claim 7, wherein the check valve has a passage formed by laminating two sheets and closely contacting each other in a spherical shape.